[1] University of Pittsburgh,Department of Epidemiology, Graduate School of Public Health
[2] University of Southern Denmark,Department of Sports Science and Clinical Biomechanics and the Center for Active and Healthy Ageing
[3] University of Pittsburgh,Department of Physical Therapy and Clinical and Translational Science Institute, School of Health and Rehabilitation Sciences
[4] California Pacific Medical Center Research Institute,Department of Epidemiology and Biostatistics
[5] University of California,Laboratory of Epidemiology and Population Sciences, National Institute on Aging
[6] National Institutes of Health,Department of Family Medicine and Public Health
[7] University of California,Geriatric Research Education and Clinical Center
[8] San Diego,Department of Medicine
[9] Minneapolis VA Health Care System,undefined
[10] University of Minnesota,undefined